Envelop.



No. 698,622. Patented Apr. 29 I902.

J. BANKERT.

ENVELOP.

(Application filed Sept. 3. 1901.\ (No Model.)

WITNESSES I INYENTDR- 7 gm 5, @MQ/ 744 @6034 M ms NORRIS PET-Ins PHOTO-GINO" WASHINGTON. o. c,

UNITE STATES PATENT OFFICE.

JOHN GEORGE BANKERT, OF WILKINSBURG, PENNSYLVANIA.

ENVELO P.

SPECIFICATION forming part of Letters Patent No. 698,622, dated April 29, 1902. Application filed September 3, 1901- Sarial No. 74,097. (No model.)

To ctZZ whom it may concern.-

Be it known that I, JOHN GEORGE BANKERT, a citizen of the United States, residing at Wilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and usefulImprovementinEnvelops,of which improvement the following is a specification.

This invention relates to certain new and useful improvements in envelops, and relates more particularly to that class that cannot be opened without detection. 7

Theinvention has for its object to construct an envelop that may be easily formed and foldedtogetherandsecurelysealed. Furthermore, to form the back of the envelop perfectly smooth to receive the address.

Another object of my invention is to construct an envelop that will be extremely simple in construction, strong, durable, and comparatively inexpensive to manufacture.

With the above and other objects in view the invention consists in the novel combination and arrangement of parts, to be hereinafter more fully described, and specifically pointed out in the claim.

In describing the invention in detail referonce is had to the accompanying drawings, forminga part of this specification, and wherein like numerals of reference indicate corresponding parts throughout the several views, in which-- Figure 1 is a plan view of my improved envelop-blank. Fig. 2 is a similar view showing the side flaps folded together. Fig. 3 is a view showing the side flaps and lower flaps folded in position. Fig. 4 is a back view of the envelop as it appears when the tongue and allparts have been securely sealed to their position. v

In the drawings the reference-numeral 1 indicates the envelop-blank and body portion of the same, said blank carrying side flaps 2 2, these side flaps having formed therein slots 3 3.

The reference-numeral 4 represents the upper flap, carrying a tongue 5.

The reference-numeral 6 indicates the lower flap, having its sides cut away, as shown at 7, and has formed therein a slot 8, said slot 8 corresponding with the slots 3 3 of the flaps 2.

The reference-numeral 9 indicates the lower flap.

The manner of sealing my improved envelop is as follows: The side fiaps 2 are folded together, as shown in Fig. 2 of the drawings, the slots 3 3 registering with one another. The lower flaps 6 and 9 are then folded upwardly, the slot 8 registering with the slots 3 3. The lower flap 9 is then bent inwardly and engages the inner faces of the folded flaps 2 2. The upper flap liS then turned down, and the tongue 5, which is gummed on one or both sides, is theninserted through the slots 3, 3, and 8 and engages the inner faces of the flaps, thus securely sealing the envelop.

The many advantages obtained by the use of my improved envelop will be readily apparent from the foregoing description, taken in connection with the accompanying drawings, and it will be noted that various changes may be made in the details of construction without departing from the general spirit of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is I In an envelop, the combination with the body portion, of side flaps having slots formed therein, an upper flap carrying a gummed tongue, a lower flap having cut-away sides with a slot formed therein, all of said slots registering when the flaps are in their nor mal position, a second lower flap, said side flaps'heing first placed in position, the lower flap being then bent to engage the outer face of said side flaps, and said second lower flap being inserted between the inner faces of the side flaps and the body portion of the envelop, and lastly said gummed tongue being inserted through all of said registering slots and engaging the inner faces of the flaps, substantially as described.

In testimony whereof I have. hereunto signed my name in the presence of two subscribing witnesses. I

JOHN GEORGE BANKERT.

In presence of-- JOHN GRQETZINGER, M. HUNTER. 

